Workpiece supporting device for laser cleaning and laser cleaning system

Abstract

The utility model provides a workpiece supporting device for laser cleaning and a laser cleaning system. The workpiece supporting device for laser cleaning comprises a base, a supporting piece and a fixing piece, the supporting piece is used for supporting a to-be-cleaned workpiece; the fixing piece is used for fixing a to-be-cleaned workpiece; the laser cleaning device further comprises heat insulation pieces, the heat insulation pieces are arranged between the supporting piece and the to-be-cleaned workpiece and between the fixing piece and the to-be-cleaned workpiece, the situation that heat generated in the laser cleaning process is transmitted to the supporting device through the workpiece to cause deformation of the supporting device can be avoided, and therefore the use stability of the supporting device can be improved, and the service life of the supporting device can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser, and particularly relates to a workpiece support device for laser cleaning and a laser cleaning system. Background Art

[0002] Traditional metal surface cleaning technologies mainly include methods such as chemical cleaning, mechanical grinding, and ultrasonic cleaning. These methods often have problems such as low efficiency, serious environmental pollution, and possible damage to the base material. Laser cleaning technology is an application of laser technology in the engineering field. Its basic principle is to utilize the characteristic of high laser energy density to make the laser interact with the pollutants attached to the workpiece base, and separate from the workpiece base in the form of instantaneously heating and expanding, melting, gas volatilization, etc. It has characteristics such as high efficiency, environmental protection, and energy saving, and has been successfully applied in fields such as tire mold cleaning, aircraft body paint removal, and cultural relic restoration, and is also gradually playing an important role in the field of metal surface treatment.

[0003] During the laser cleaning process, a workpiece support device is generally used to support and fix the workpiece to be cleaned. During the actual laser cleaning operation, heat is generated, which causes the temperature of the workpiece to rise and conduct heat to the workpiece support device. Especially when the workpiece material is a good thermal conductor such as metal, it is easier to conduct heat to the support device, causing the temperature of the support device to rise, which will cause problems such as deformation of the support device, resulting in unstable use performance and reduced service life of the support device or even scrapping. Therefore, solving the heat insulation problem of the workpiece support device is one of the important guarantees for ensuring the stable use of the support device and extending its service life. Summary of the Utility Model

[0004] In view of the above technical status quo, the utility model provides a workpiece support device for laser cleaning, which can avoid heat generated during laser cleaning from being transferred to the support device through the workpiece, thereby causing deformation of the support device, etc., and can improve the use stability and service life of the support device.

[0005] The technical solution provided by the utility model is: a workpiece support device for laser cleaning, including a base, and a support member and a fixing member arranged on the base;

[0006] The support member is used to support the workpiece to be cleaned;

[0007] The fixing member is used to fix the workpiece to be cleaned;

[0008] It further includes a heat insulation member, and the heat insulation member is arranged between the support member and the workpiece to be cleaned and between the fixing member and the workpiece to be cleaned.

[0009] The heat insulation member is used to isolate the support member from the workpiece to be cleaned and the fixing member from the workpiece to be cleaned, so as to prevent the workpiece to be cleaned from directly conducting heat to the support member and the fixing member. The constituent material of the heat insulation member is heat-insulating material, and the specific material is not limited, such as glass fiber, asbestos, rock wool, silicate, porous silicon material, etc., and preferably a heat-resistant heat-insulating material.

[0010] The workpiece to be cleaned includes a surface to be cleaned. In order to improve the cleaning effect of laser cleaning on the surface to be cleaned, preferably, during laser cleaning, the surface to be cleaned should be exposed, that is, the surface to be cleaned is not in contact with or blocked and is exposed in the laser cleaning area. Therefore, the surface to be cleaned should not be in contact with or blocked by the fixing member and the support member. For this reason, the surface of the workpiece to be cleaned other than the surface to be cleaned is called the contactable surface. For example, Figure 1 As shown in the workpiece 100 to be cleaned, its upper surface is the surface 101 to be cleaned. During laser cleaning, the surface 101 to be cleaned is not in contact with or blocked by the fixing member and the support member and is exposed in the laser cleaning area. Its bottom surface 102, left side surface 103, and right side surface 104 are non-cleaning surfaces and can be in contact with or blocked by the fixing member and the support member; the bottom surface 102, left side surface 103, and right side surface 104 are called contactable surfaces. The workpiece to be cleaned is fixed by the first fixing member 201 and the second fixing member 202. The first fixing member 201 contacts the left side surface 103, and the second fixing member 202 contacts the right side surface 104.

[0011] As an implementation manner, the fixing member includes a first fixing member and a second fixing member, and the first fixing member and the second fixing member are located on both sides of the support member; a first heat insulation layer is provided on the surface of the first fixing member, and a second heat insulation layer is provided on the surface of the second fixing member; a third heat insulation layer is provided on the surface of the support member; during laser cleaning, the workpiece to be cleaned is located on the surface of the third heat insulation layer, and the first heat insulation layer and the second heat insulation layer are respectively on both sides of the workpiece to be cleaned and in contact with the contactable surface to fix the workpiece to be cleaned. Preferably, the first heat insulation layer, the second heat insulation layer, and the third heat insulation layer are respectively fixed on the surfaces of the first fixing member, the second fixing member, and the support member, and the fixing method is not limited, including bonding, coating, spraying, deposition and other methods.

[0012] As an implementation manner, the first fixing member includes a first clamping plate and a second clamping plate; the base is provided with a first groove and a second groove, and the first groove and the second groove are distributed on both sides of the support member; one end of the first clamping plate can extend into the first groove, so as to fix the first clamping plate; one end of the second clamping plate can extend into the second groove, so as to fix the second clamping plate.

[0013] Preferably, the first fixing member further includes a first pushing member and a first fastening member; the second fixing member further includes a second pushing member and a second fastening member; first fixing plates and second fixing plates are arranged on both sides of the base; a first sliding rail is arranged in the first groove, and the first clamping plate can slide on the first sliding rail; a second sliding rail is arranged in the second groove, and the second clamping plate can slide on the second sliding rail; one end of the first pushing member is fixedly connected to the first clamping plate, and the other end passes through the first fixing plate and is connected to the first fastening member. By the pushing of the first pushing member, the first clamping plate can slide on the first sliding rail and is fixed to the first fixing plate by the first fastening member when sliding to a proper position; one end of the second pushing member is fixedly connected to the second clamping plate, and the other end passes through the second fixing plate and is connected to the second fastening member. By the pushing of the second pushing member, the second clamping plate can slide on the second sliding rail and is fixed to the second fixing plate by the second fastening member when sliding to a proper position.

[0014] As an implementation manner, the first pushing member is a first screw rod, and the first fastening member is a first nut matching the first screw rod; the second pushing member is a second screw rod, and the second fastening member is a second nut matching the second screw rod.

[0015] Preferably, the support member can be telescopically adjusted in the vertical direction of the base. As an implementation manner, the support member includes a support surface, a third screw rod with adjustable height, and a third nut. One end of the third screw rod is fixedly connected to the support surface, and the other end passes through the base and is connected to the third nut. The height of the support surface can be adjusted by screwing the third screw rod in and out, and is fixed by the third nut after being adjusted to a proper height.

[0016] During the laser cleaning process, elements may be generated when the surface of the support device is irradiated by the laser and introduced into the workpiece, resulting in contamination of the workpiece. Therefore, preferably, the material of the support device is selected as polytetrafluoroethylene. For example, one or both of the materials of the fixing member and the support member are selected to be made of polytetrafluoroethylene. The polytetrafluoroethylene material is a stable polymer material. Compared with materials such as metals, alloys, and ceramics, it is not easy to introduce new elements to contaminate the workpiece during the laser cleaning process.

[0017] To improve the cleaning integrity of the surface to be cleaned during the laser cleaning process, preferably, the height of the surface to be cleaned of the workpiece to be cleaned is higher than the surface height of the fixing member, that is, the distance between the surface to be cleaned and the laser light source is smaller than the distance between the surface of the fixing member and the laser light source. As Figure 1 shown, the workpiece to be cleaned is fixed by the first fixing member 201 and the second fixing member 202. The distance between the surface 203 of the first fixing member 201 and the surface 204 of the second fixing member 202 and the laser light source 300 is greater than the distance between the surface to be cleaned 101 and the laser light source 300.

[0018] The present utility model also provides a laser cleaning system, which includes a base, a vertical lifting device fixedly connected to the base, a laser head installed on the lifting device, and the workpiece support device of the present utility model; in the working state, the workpiece support device is fixed on the base, the workpiece to be cleaned is placed on the surface of the support member and fixed by the fixing member, and the distance between the laser head and the surface of the workpiece to be measured is adjusted by the lifting device.

[0019] Preferably, moving wheels are provided at the bottom of the base to facilitate the movement of the laser cleaning system.

[0020] Preferably, the laser cleaning system further includes a control unit and a display terminal. The control unit is used to control the parameter settings in laser cleaning, and the display terminal is used to display the parameters in laser cleaning.

[0021] Compared with the prior art, the present utility model has the following beneficial effects:

[0022] (1) The present utility model takes into account the influence of heat on the workpiece support device during laser cleaning. By arranging heat insulation members between the support member and the workpiece to be cleaned and between the fixing member and the workpiece to be cleaned, it effectively avoids the problem that the workpiece conducts heat to the support member and the fixing member due to the increase in temperature caused by laser cleaning, resulting in the deformation of the workpiece support device due to the increase in temperature, which reduces its use stability and service life.

[0023] (2) The present utility model takes into account the element pollution problem of the workpiece support device caused by laser irradiation during laser cleaning. Preferably, the workpiece device is made of polytetrafluoroethylene material to avoid the element pollution introduced during laser cleaning.

[0024] (3) When performing surface analysis and determination of the material element content of the workpiece, first use the laser cleaning system of the present utility model to clean the workpiece, and then perform analysis and determination, which is beneficial to obtaining the true element content result of the workpiece material, reducing the test time, and improving the test efficiency.

[0025] As a surface analysis technique, glow discharge mass spectrometry is an analytical method that combines a low-speed flow direct current glow discharge ion source with a double-focusing high-resolution magnetic mass spectrometer for mass spectrometry. It can measure the contents of more than 70 elements at one time, and has the advantages of solid sample injection testing, ultra-low detection limit, and fast analysis speed. It is considered to be the element analysis method with the widest analysis range and sufficient sensitivity at present, and is an effective means for the total element analysis of inorganic solid materials and the impurity content analysis of high-purity materials. Glow discharge mass spectrometry has relatively high requirements for the surface cleanliness of the tested samples. If the surface cleanliness of the sample is high, the sample surface can fully represent its matrix composition, which is conducive to reducing the testing time and improving the testing efficiency. On the contrary, if the sample surface is contaminated and the cleanliness is low, there will be a deviation between the test result and the actual content of the impurity elements in the sample. In order to obtain the actual element content in the sample, it is necessary to extend the testing time, which reduces the testing efficiency.

[0026] Experiments have confirmed that when using glow discharge mass spectrometry to analyze and determine the element content of workpiece materials, first use the laser cleaning system of the present invention to clean the workpiece, and then conduct the analysis and determination. The true element content results of the workpiece materials can be obtained in a short time, and the testing efficiency can be improved. Compared with directly conducting the analysis and determination without using the laser cleaning system of the present invention to clean the workpiece, the testing efficiency is increased by more than 50%. Brief Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the surface to be cleaned and the surface that can be contacted of the workpiece, and a schematic diagram of the distance between the surface of the fixing part and the surface to be cleaned from the laser light source.

[0028] Figure 2 It is a schematic structural diagram of the workpiece support device for laser cleaning in Embodiment 1.

[0029] Figure 3 It is a schematic structural diagram of the laser cleaning system in Embodiment 2.

[0030] Figure 4 It is a test result diagram of Sample No. 1 in Embodiment 3.

[0031] Figure 5 It is a test result diagram of Sample No. 2 in Embodiment 3.

[0032] Figure 1 and Figure 3The numerical labels in it are: base 1, laser 2, lifting device 3, workpiece support device 4, base 10, first fixing plate 11, second fixing plate 12, third screw 21, support surface 22, first clamping plate 31, second clamping plate 32, first heat insulation layer 41, second heat insulation layer 42, third heat insulation layer 43, first groove 51, second groove 52, first screw 61, second screw 62, second nut 72, workpiece to be cleaned 100, surface to be cleaned 101 of the workpiece to be cleaned, bottom surface 102 of the workpiece to be cleaned, left side surface 103 of the workpiece to be cleaned, right side surface 104 of the workpiece to be cleaned, first fixing member 201, second fixing member 202, surface 203 of the first fixing member, surface 204 of the second fixing member, laser light source 300. Detailed implementation mode

[0033] The following further elaborates on the present utility model in conjunction with embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present utility model. Some non-essential improvements and adjustments made by those skilled in the art to the present utility model based on the above content of the present utility model still fall within the protection scope of the present utility model.

[0034] Embodiment 1:

[0035] In this embodiment, the workpiece support device for laser cleaning is as Figure 2 shown, including a base 10, a support member and a fixing member arranged on the base, and a heat insulation member. The support member is used to support the workpiece to be cleaned, the fixing member is used to fix the workpiece to be cleaned, and the heat insulation member is arranged between the support member and the workpiece to be cleaned and between the fixing member and the workpiece to be cleaned.

[0036] Among the surfaces of the workpiece to be cleaned, the surfaces other than the surface to be cleaned are called contactable surfaces.

[0037] In this embodiment, the support member includes a support surface 22, a third screw 21 with adjustable height and a third nut ( Figure 1 which is located at the bottom of the base in Figure 1 so the third nut is not shown in

[0038] ). One end of the third screw 21 is fixedly connected to the support surface 22, and the other end passes through the base 10 and is connected to the third nut. The height of the support surface 22 can be adjusted in the vertical direction by screwing the third screw 21 in and out, and is fixed by the third nut when adjusted to the appropriate height.

[0039] In this embodiment, first fixing plates 11 and second fixing plates 12 are arranged on both sides of the base 10.

[0040] In this embodiment, the first fixing member includes a first clamping plate 31, a first pushing member, and a first fastening member. The second fixing member includes a second clamping plate 32, a second pushing member, and a second fastening member. A first groove 51 and a second groove 52 are provided on the base 10.

[0041] In this embodiment, the first pushing member is a first screw 61, and the first fastening member is a first nut that matches the first screw 61 ( Figure 1 The first nut is blocked by the first fixing plate 11 and not shown). The second pushing member is a second screw 62, and the second fastening member is a second nut 72 that matches the second screw 62.

[0042] In this embodiment, a first sliding rail is provided in the first groove 51, and the first clamping plate 31 can slide on the first sliding rail. A second sliding rail is provided in the second groove 52, and the second clamping plate 32 can slide on the second sliding rail. One end of the first screw 61 is fixedly connected to the first clamping plate 31, and the other end passes through the first fixing plate 11 and is connected to the first nut. By the push of the first screw 61, the first clamping plate 11 can slide on the first sliding rail. When it slides to the appropriate position, it is fixed together with the first fixing plate 11 by the first nut 61. One end of the second screw 62 is fixedly connected to the second clamping plate 32, and the other end passes through the second fixing plate 12 and is fixedly connected to the second nut 72. By the push of the second screw 62, the second clamping plate 32 can slide on the second sliding rail. When it slides to the appropriate position, it is fixed together with the second fixing plate 12 by the second nut 62.

[0043] In this embodiment, a first heat insulation layer 41 is bonded to the surface of the first clamping plate 31 facing the support surface 22, a second heat insulation layer 42 is bonded to the surface of the second clamping plate 32 facing the support surface 22, and a third heat insulation layer 43 is bonded to the surface of the support surface 22. The first heat insulation layer 41, the second heat insulation layer 42, and the third heat insulation layer 43 are all made of porous silicon material.

[0044] In this embodiment, the first clamping plate 31, the second clamping plate 32, the first fixing plate 11, the second fixing plate 12, the support surface 22, and the base 10 are all made of polytetrafluoroethylene material.

[0045] In this embodiment, during laser cleaning, the workpiece to be cleaned is placed on the surface of the third heat insulation layer 43. The height of the workpiece is adjusted by the third screw to make it higher than the surfaces of the first clamping plate 31 and the second clamping plate 32 facing the laser head, and then the height is fixed by the third screw 21; the first clamping plate 31 is moved in the first groove 51 by rotating the first screw 61, and the second clamping plate 32 is moved in the second groove 52 by rotating the second screw 62. The contactable surfaces of the workpiece are clamped from both sides of the workpiece, so that the surface to be cleaned of the workpiece is exposed and faces the laser head. Then, the first clamping plate 31 is fixed to the first fixing plate 11 by the first nut, and the second clamping plate 32 is fixed to the second fixing plate 12 by the second nut 62.

[0046] Example 2:

[0047] In this embodiment, the laser cleaning system is as shown in Figure 3 and includes a base 1, a vertical lifting device 3 fixedly connected to the base 1, a laser 2 mounted on the lifting device 3, and the workpiece support device 4 in Example 1; in the working state, the workpiece support device 4 is fixed on the base 1, the workpiece to be measured is placed on the surface of the support member and fixed by the fixing member, and the distance between the laser 2 and the surface of the workpiece to be measured is adjusted by the lifting device.

[0048] In this embodiment, moving wheels are provided at the bottom of the base 1 to facilitate the movement of the laser cleaning system.

[0049] In this embodiment, the laser cleaning system may further include a control device and a display terminal. The control device is used to control the setting of laser cleaning parameters, and the display terminal is used to display the laser cleaning parameters.

[0050] Using this laser cleaning system to perform laser cleaning on a sample. The sample is metallic copper, in the shape of a cube with dimensions of 3 cm × 3 cm × 3 cm. The comparison before and after cleaning shows that the rust and contaminants on the surface of the sample are removed after being cleaned by the laser cleaning system, and the surface of the sample is flat, clean and brand new.

[0051] Example 3:

[0052] In this embodiment, the workpiece sample is a metallic aluminum flake sample with a rectangular cross-section of 2 cm × 2 cm and a thickness of 0.3 cm. The workpiece sample is divided into two parts, denoted as Sample No. 1 and Sample No. 2. The glow discharge mass spectrometry is used to measure the contents of three impurity elements, sodium, magnesium and iron, in the workpiece sample.

[0053] For Sample No. 1, the glow discharge mass spectrometry is directly used to measure the contents of the three impurity elements, sodium, magnesium and iron. The specific measurement method is as follows: Sample No. 1 is introduced into the glow discharge chamber, and the glow discharge is started. The specific parameters are shown in Table 1.

[0054] Table 1: Glow discharge parameters

[0055] Instrument parameters Parameter setting Glow discharge gas flow rate 0.15 SCCM to 0.35 SCCM Glow discharge voltage 900 V to 1200 V Glow discharge current 2.0 mA Resolution 3500～4500

[0056] For Sample No. 2, first use the laser cleaning system in Example 2 to perform laser cleaning, and then use the glow discharge mass spectrometry to measure the contents of the three impurity elements, sodium, magnesium and iron. The equipment and measurement method used for the glow discharge mass spectrometry are exactly the same as those used for Sample No. 1.

[0057] The detection data graphs obtained for Sample No. 1 and Sample No. 2 are respectively as shown in Figure 4 and Figure 5, where the abscissa is time in minutes and the ordinate is the content of the test element in ppm. Among them, the trend curves showing the changes in the contents of sodium, magnesium, and aluminum elements with the test time are shown. From Figure 4 It can be analyzed that when the sample is directly subjected to glow discharge mass spectrometry testing without cleaning, the contents of sodium, magnesium, and iron elements gradually tend to be stable after 254 minutes, proving that the contamination of these three elements on the sample surface is relatively serious. From Figure 5 It can be analyzed that when the sample is cleaned and then subjected to glow discharge mass spectrometry testing, the contents of sodium, magnesium, and iron elements basically tend to be stable after only about 10 minutes, and then slightly decrease after 30 minutes, but the decrease is very small, and it can be considered that the test results are stable. From Figure 4 And Figure 5 It is proved that the contamination of sodium, magnesium, and iron elements on the sample surface is basically eliminated after laser cleaning, and the cleaning effect is very remarkable.

[0058] Finally, it should be noted that the specific embodiments described in this article are only examples to illustrate the spirit of the present invention, rather than limitations on the implementation manners of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. It is not necessary and impossible to list all the implementation manners here. And these obvious changes or variations derived from the essence of the present invention still fall within the protection scope of the present invention. Interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A workpiece support device for laser cleaning, characterized in that: It includes a base, a support member and a fixing member provided on the base; The support member is used to support the workpiece to be cleaned; The fixing member is used to fix the workpiece to be cleaned; It further includes a heat insulation member, which is arranged between the support member and the workpiece to be cleaned and between the fixing member and the workpiece to be cleaned.

2. The workpiece support device for laser cleaning according to claim 1, wherein: The heat insulation member is composed of one of fiberglass, asbestos, and porous silicon material.

3. The workpiece supporting device for laser cleaning according to claim 1, characterized in that: In the workpiece to be cleaned, the surface other than the surface to be cleaned is called the contactable surface; The fixing member includes a first fixing member and a second fixing member, and the first fixing member and the second fixing member are located on both sides of the support member; a first heat insulation layer is provided on the surface of the first fixing member, and a second heat insulation layer is provided on the surface of the second fixing member; a third heat insulation layer is provided on the surface of the support member; During laser cleaning, the workpiece to be cleaned is located on the surface of the third heat insulation layer, and the first heat insulation layer and the second heat insulation layer are respectively in contact with the contactable surface on both sides of the workpiece to be cleaned, so that the workpiece to be cleaned is fixed.

4. The workpiece support device for laser cleaning according to claim 3, characterized in that: The first fixing member includes a first clamping plate and a second clamping plate; the base is provided with a first groove and a second groove, and the first groove and the second groove are distributed on both sides of the support member; one end of the first clamping plate can extend into the first groove, so as to fix the first clamping plate; one end of the second clamping plate can extend into the second groove, so as to fix the second clamping plate.

5. The workpiece support device for laser cleaning according to claim 4, wherein: The first fixing member further includes a first pushing member and a first fastening member; The second fixing member further includes a second pushing member and a second fastening member; First fixing plates and second fixing plates are provided on both sides of the base; The first groove is provided with a first slide rail, and the first clamping plate can slide on the first slide rail; The second groove is provided with a second slide rail, and the second clamping plate can slide on the second slide rail; One end of the first pushing member is fixedly connected to the first clamping plate, and the other end passes through the first fixing plate and is connected to the first fastening member; One end of the second pushing member is fixedly connected to the second clamping plate, and the other end passes through the second fixing plate and is connected to the second fastening member.

6. The workpiece support device for laser cleaning according to claim 5, characterized in that: The first pushing member is a first screw rod, and the first fastening member is a first nut matching the first screw rod; The second pushing member is a second screw rod, and the second fastening member is a second nut matching the second screw rod.

7. The workpiece supporting device for laser cleaning according to claim 1, characterized in that: The support member can be telescopically adjusted in the vertical direction of the base.

8. The workpiece support device for laser cleaning according to claim 1, wherein: The fixing member and the support member are made of polytetrafluoroethylene.

9. The workpiece support device for laser cleaning according to claim 1, characterized in that: The distance between the surface to be cleaned of the workpiece to be cleaned and the laser light source is less than the distance between the surface of the fixing member and the laser light source.

10. A laser cleaning system, characterized in that: It includes a base, a lifting device in the vertical direction fixedly connected to the base, a laser installed on the lifting device, and the workpiece support device according to any one of claims 1 to 9.

11. The laser cleaning system according to claim 10, characterized in that: Moving wheels are provided at the bottom of the base.

12. The laser cleaning system according to claim 10, characterized in that: The laser cleaning system further includes a control unit and a display terminal, the control unit is used to control the parameter settings in laser cleaning, and the display terminal is used to display the parameters in laser cleaning.

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